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(No Model.) 4 SheetsSheet 1.

J. ALBRECHT. 'MAGHINE FOR SEWING BOOTS 0R SHOES. No. 375,244. j Patented Dec. 20, 1887.

4 Sheets-Sheet 2.

(No Model.)

J. ALBREOHT. MACHINE FOB. SEWING BOOTSOR SHOES.

Patented Dec. 20

b /w/ n a rm 8 m n MA W M im m J h (No Model.) J ALBRECHT. 4ISheetsSheet 3.

MAGHINE FOR SEWING BOOTS 0R SHOES. No. 375,244. Patented Dec. 20, 1887.

(No Model.) 4 Sheets-Shet 4.

1 J. ALBRECHT. I MAGHINE FOR SEWING BOOTS 0R SHOES.

No. 375,244. Patented Dec. 20,- 1887.

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UNITED STATES PATENT OFFICE.-

JOHANNES ALBRECHT, OF OANNSTADT, WURTEMBERG, GERMANY.

MACHINE FOR SEWING BOOTS OR SHOES.

V SPECIFICATION forming part of Letters Patent No. 375,244, dated December 20, 1887.

Application filed December 9, 1886. Serial No. 221,121. No model.) Patented in Germany October 11, 1885, No 38,410, and in England September 29, 1886, No. 12,349.

To all whom it may concern.-

Be it known that I, J OHANNES ALBRECHT, a subject of the King of Wiirtemberg, residing at Gannstadt, in the Kingdom of Wiirtemberg, and Empire of Germany, have invented new and useful Improvements in Machines for Sewing Boots or Shoes, (for which I have obtained a patent in Great Britain, No. 12,349, dated September 29, 1886, and in Germany, No. 38,410, dated October 11, 1885,) of which the following is a specification.

This invention relates to machines adapted for sewing soles of boots or shoes, as fully set forth in the following specification and claims, and illustrated in the accompanying drawings, in which- Figure 1 is a front elevation of a machine containing my invention. Fig. 2 is a side Fig. 3 is a section in the plane a: m, Fig. 1. Fig. 4. is a section in the plane y y, Fig. 1, the needle-head and awl-head being removed. Fig. 5 is a section on the line y y, Fig. l, the awl-head and 'shuttlebearing mechanism being removed.

Fig. 6 is a detail front view of two cam-disks, the shuttle having been moved to a different position in Fig. 6 from that shown in Fig. 1. Fig. 7 is a detail elevation, partly in section, of a needle-head and an awl-head withtheir supporting-shaft. Fig. 8 shows the form of stitches. Fig. 9 is a section in the plane A B, Fig. 2, looking in the direction of the arrow. Fig. 10 is a section in the plane B C, Fig. 4, looking in the direction of the arrow; and Fig. 11 is a perspective view of the machine.

Similar letters indicate corresponding parts. The rotary driving-shaft a of the machine is suitably journaled, and on said shaft are mounted or secured three cam-hubs, disks, or wheels, n g u. A shaft, b, is placed in the machine in such a manner that the shaft 1) can move. or oscillate in the direction of its length. The needle-head o oscillates about the shaft 1); but said needle-head does not partake of the longitudinal motion'of the shaft b. The awlhead (1 oscillates about the shaft b, and also partakcs of the longitudinal motion of the shaft b, Fig. 7.

The needle-head 0 and awl-head d, respectively, are oscillated by the levers e and f, Fig.

3. The levers e f oscillate about a suitable shaft-as the shaft W-and said levers receive motions from suitable cams on the hub or disk The work-support 2' is secured to the frame or other suitable part of the machine, Fig. 2. The presser-foot K is placed in proper relative position to the work-support, and said presser-foot K is supported by the head K, mounted on the shaft 0. A lever, Z, is pressed by a spring, or weight, m, against a toe or projection, K, of the head K, thus forcing the presser-foot K toward the work-support until the projection n of the hub, wheel, or disk n presses against the roller-stud of the lever o. By the motion of the lever 0 thus produced the dog 0 presses against the toe K and moves the presser-foot K somewhat away from the work-support i.

One end of the shaft 5 is slotted for the reception of a lever, 19, Figs. 1, 2, and 9, turning about a pivot or fulcrum, p, and receiving motion from the hub, wheel, or disk 12. The oscillations of the lever 1) cause longitudinal motion of the shaft 1; for a distance equal to the length of one stitch.

The shuttle-lever 1*, Figs. 1, 4., and 6, oscillates about the pivotr'. The shuttle S rests loosely in a recess or between claws of the shuttle-lever 7'. The shuttle-lever r is preferably made in two parts, or split, and by removing one part of the shuttle-lever the shuttle S can be taken out of its place and supplied with the shuttle-thread 2. The shuttle-thread can be rolled up into a ball of any convenient formsuch as egg-shapedand placed into the shuttle, which latter may be provided with a cover in any well-known way. The shuttlethread 2 can pass out of the shuttle through a hole in the shuttle. The shuttle-lever r is connected at one side of its pivot n with the lever 16, oscillating about pivot t. actuated by the disk, wheel, or hub u.

The hook h, Figs. 1, 2, 3, and 6, oscillates about the pivot h. The hook h is provided with a roller, h, and a spring, q, presses the roller h against the disk, wheel, or hub g, from which the hook it receives motion.

The lever t is The take-up lever or stitch-tightening lever IOO V is joined, by a pivot, 3, Figs. 4, 5, and 10, an arm, X, the free end of which is U-shaped, and which is provided with a roller, X. The take-up lever or stitch-tighteninglever V and its arm X oscillate between the branches of a fork, y, Fig. l, and a spring, Z, Fig. 10, tends to force the lever V and arm X apart.

The thread-guide D, Figs. 4. and 5, is pro vided with a slot, D, and a hook, D Fig. 10. Motion is imparted to the thread-guide D by a link and lever, E E. The lever E oscillates about a shaft, E, and the roller E of the lever E is held against the disk, wheel, or hub u by a spring or weight, F, and a suitable recess or depression, a, in the hub it allows the spring to move the lever E and guide D when said depression it passes by the roller E.

The arm G, Figs. 1 and 4, serves to guide the lower thread, 1, which passes from the spool H, over the guide-roll H, through a hole in the arm G, from whence it passes through the slot 1) of the thread-guide to the roller X of the arm X, and from the roller X the thread 1 passes through a perforation in the arm X, Figs. 1 and 4, toward the shuttle S.

The operation of the machine is as follows: The work to be sewed is inserted in the customary manner between the work-support i and the presser-foot K. On the revolution of the shaft to the awl d pierces the material, and during such piercing the shaft 1), with the awl and the material,moves thelength of thestitch, in which movement the presser-foot is slightly raised. \Vhen facing the front of the machineas, for example, in facing Fig. 1 of the drawings-this motion of the material is toward the left of the spectator. The perforation made by the awl (1 thus comes under the hook-needle c, and said needle then follows the awl through said perforation. The take-up lever or stitch-tightening lever V and the lever X then move toward the material, and the threadguide D moves backward, whereby the hook D places the thread 1 over the U-formed mouthpiece of theleverX, Fig. 5. XVhen the lever X has arrived near the needle-hook, the bent arm or branch of the fork y imparts a lateral motion to the lever X, which lateral motion brings the thread 1 into engagement with the needle-hook. The needle-hook then rises or moves away from the material and draws a loop of the thread 1 through the material, Fig. 3, and the thread guide D moves forward and releases the thread 1. The loop in the thread is separated by a proper movement of the hook h, so that the shuttle S, which now moves toward said loop, can pass through said loop, and the hook-needle 0 moves slightly forward, so that the thread loop becomes disengaged from the needle -loop, and said loop is held by the hook h, Fig, (3. The movement of the shuttle S carries said shuttle through the loop, then the take-up lever or stitch-tightening lever V and the lever X tighten the loop, Figs. 1, 4, and S, and the shuttle S returns to its starting position. While the shuttle Spasses through the loop and the loop is being tightened the shaft I) and the awl move the length of astiteh toward the right of the spectator, looking at Fig. 1, and when the awl is making its next perforation in the material the awl and shaft 1) again move toward the left. The material is thus fed along.

Fig. 8 shows the stitch formation in an enlarged scale, representing the loops formed by the thread 1, and also representing the shuttle thread 2.

\Vhat I claim as new, and desire to secure by Letters Patent, is-

1. The combination of the lengthwise-movable shaft b, the hooked needle'carrying head 0, and the awl-carrying head (i, both mounted directly upon the said shaft, the needle-head oscillating thereupon without partaking of its lengthwise movement and the awl-head oscillating on and partaking of the lengthwise movement of the shaft, substantially as de' scribed.

2. The combination of the lengthwise-movable shaft b, hooked needle-carrying head 0, and the awl-carrying head d, both mounted on said shaft, the needle-carrying head oscillating thereupon without partaking of its lengthwise movement, and the awl-carrying head oscillating on and partaking of the lengthwise movement of shaft, with the pivoted lever p, connected at one end with the shaft, and the cam-disk n, acting on the other end of the lever, substaigtially as and for the purpose described.

3. The combination of the shaft 0, the presser-i'oot carrying-head K, oscillating on said shaft, and having the projecting toe K the pivoted lever 0, having the dog 0', acting on said toe to raise the presser-foot, the cam-disk n, for operating the lever, the pivoted lever Z, having one end engaging the head to oscillate it and lower the presser-foot, and a spring, in, substantially as described.

4. The combination of the oscillating needlecarrying head 0, the pivoted shuttle-carrying lever r, and the hook h, both oscillating in a plane at right angles to the plane of oscillation of the needle, and the rotating cam-disks a and g, for oscillating said lever and hook to and from each other, substantially as described.

5. The combination of the oscillating needlecarrying head 0, the pivoted shuttle-carrying lever and the pivoted hook h, both oscillating in a plane at right angles to the plane of oscillation of the needle-carrying head, the rotating cam-disk g, for oscillating the hook, the pivoted lever 15, connected with the shuttlelever at one side of its pivot, and the rotating cam-disk a, for oscillating the shuttle lever, substantially as described.

6. The combination, with the oscillating needle-carrying head 0, of the pivoted oscillating hook h, the rotating cam-disk for oscillating the hook in a plane at right angles to the plane of oscillation of the needle, and the spring q, for pressing one end of the hook IIO against the cam disk, substantially as described. v

7.- The combination of the cam-disk u, the shaft W, the stitch-tightening lever V, hung between its ends on said shaft and engaged at one end by the cam-disk, the stitch-tightening arm X, pivoted to the other end of the said 1ever, the spring Z, acting to force the lever and arm apart, and a fork, 3 between which the pivoted angle-lever E, connected at one end with the thread-guide, the rotating cam-disk u, acting on the other end of the lever, and a spring, F, operating to force the latter end of the lever against the cam-disk, substantially as described.

In testimony whereof I have hereunto set my hand and seal in the presence of two subscribing witnesses.

JOHANNES ALBRECHT. 1 s.]

\Vitnesses:

H. O. GRos, ED. WAGENMANN. 

